Collective variable model for the dynamics of liquid crystal skyrmions

Alvim, T., Telo da Gama, M.M. and Tasinkevych, M. ORCID: 0000-0001-6689-1844, 2024. Collective variable model for the dynamics of liquid crystal skyrmions. Communications Physics, 7: 2. ISSN 2399-3650

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Liquid crystal skyrmions are topologically protected spatially-localized distortions of the director field which exhibit particle-like properties including translational motion in oscillating electric fields. Here, we develop a collective variable model of the skyrmion dynamics, extending the approach of Long and Selinger proposed earlier for one dimensional systems. The model relates the skyrmion motion to a complex dynamics of the width of the twist wall around the skyrmion core. The width evolves in a non-reciprocal way, quantifying squirming deformations of the high twist region within on and off states of the field. We analyze in details the average skyrmion velocity as a function of the frequency and strength of the field as well as its duty cycle. The model predictions agrees qualitatively with experiments and results of numerical minimization of the Frank-Oseen model. Our results provide insights into the conditions necessary to observe velocity reversal as a function of the field parameters.

Item Type: Journal article
Publication Title: Communications Physics
Creators: Alvim, T., Telo da Gama, M.M. and Tasinkevych, M.
Publisher: Nature Research
Date: 2 January 2024
Volume: 7
ISSN: 2399-3650
Rights: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit
Divisions: Schools > School of Science and Technology
Record created by: Jonathan Gallacher
Date Added: 30 Jan 2024 10:22
Last Modified: 30 Jan 2024 10:22

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